3 ms·Pfizer says omicron vaccine will be ready in March2 points by belltaco 5y agooriettaxx 5y agohow many booster shots (per year)? VAAS - Vax as a Service.ls15 5y agoOmicron is expected to peak end of january. Based on experience, this vaccine may be 60% effective against severe disease with the sigma variant for a little while after multiple shots.